Add sampling so workflows run faster

Author: Guillaume-Henri Huon

definitions/staging/stg_badges.sqlx

@@ -10,4 +10,6 @@ select
   date as award_timestamp,
   user_id
 from
-  ${ref("badges")}
+  ${ref("badges")}
+
+limit 100

definitions/staging/stg_posts_answers.sqlx

@@ -16,4 +16,6 @@ from
   ${ref("posts_answers")}
 where
   -- limit to recent data for the purposes of this demo project
-  creation_date >= timestamp("2019-01-01")
+  creation_date >= timestamp("2019-01-01")
+
+  limit 100

definitions/staging/stg_posts_questions.sqlx

@@ -16,4 +16,6 @@ from
   ${ref("posts_questions")}
 where
   -- limit to recent data for the purposes of this demo project
-  creation_date >= timestamp("2019-01-01")
+  creation_date >= timestamp("2019-01-01")
+
+  limit 100

definitions/staging/stg_users.sqlx

@@ -10,4 +10,6 @@ select
   creation_date,
   round(timestamp_diff(current_timestamp(), creation_date, day)/365) as user_tenure
 from
-  ${ref("users")}
+  ${ref("users")}
+
+  limit 100